Definition

A note about the restrictions imposed on access to the described materials. For published works, this field contains information on limited distribution.

Use field 521 if a note merely indicates the intended audience of a publication and does not imply restricted access. Use field 540 for terms governing the use of materials after access has been granted. Use field 590 if the note indicates local limited use (e.g., kept in a locked closet).

Note: For continuing resources, the restrictions must apply to all issues.

1st Indicator

Restriction.

No information provided. No information provided about whether the note states that materials are restricted or unrestricted.

0

No restrictions. No restrictions on materials.

1

Restrictions apply. Restrictions apply to some or all of the material.

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank ( ).

Undefined

Subfields

ǂa Terms governing access

Legal, physical or procedural restrictions imposed on individuals wishing to see the described materials.

506

1

Available to subscribing member institutions only.

[A note for an electronic journal that is restricted]

506

1

Classified.

506

1

Confidential.

506

1

Not available for commercial use, sale, or reproduction.

506

1

Open to investigators with permission of the Clark family.

506

1

Prior to 1981, distribution was limited to federal judicial personnel.

506

1

Some of the personal correspondence is restricted until Oct. 1, 1983.

ǂb Jurisdiction

The name of a person, an institution or a function or position within the institution by whom or which the terms governing access are imposed and/or enforced and to whom the restriction may be appealed.

506

1

Restricted access; ǂc Written permission required; ǂb Donor.

506

1

ǂ3 Office files of Under Secretary ǂa No one may examine these records or obtain information from them or copies of them except by written permission; ǂb Secretary of the Treasury or his duly authorized representative; ǂc Kept in remote storage; access requires 24 hours advance notice.

ǂc Physical access provisions

Any arrangements required for physical access that may change from time to time.

Data taken from a standardized list indicating the level or type of restriction. You may use terms of your choice or those from the Standardized Terminology for Access Restriction (http://www.oclc.org/digitalregistry/506F_vocabulary.pdf) from the DLF/OCLC Registry of Digital Masters Working Group.

506

1

Closed until January 1, 2068. ǂf No online access. ǂ2 star

ǂu Uniform Resource Identifier

For information about subfield ǂu, see Control Subfields. Repeat subfield if digital object has multiple identifiers (URIs).

ǂ3 Office files of Under-Secretary ǂa No one may examine these records or obtain information from them or copies of them except by written permission; ǂb Secretary of the Treasury or his duly authorized representative; ǂc Kept in remote storage; Access requires 24 hours advance notice.

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.